ASICS Men's Gel-Sonoma 2 Running Shoe 100% Textile and SYnthetic Imported Rubber sole Shaft measures approximately 3" from arch SpEVA Midsole: Material Improves bounce-back characteristics and decreases midsole breakdown. Trail Specific Outsole: Reversed lugs provide uphill and downhill traction on all types of terrain. Rearfoot GEL Cushioning System: Attenuates shock during impact phase and allows for a smooth transition to midstance.